Grinding-machine.



F. STARIN.

GRINDING MACHINE.

APPLICATION FILED Nov. 1. 191a.

Patented June 5, 1917.

5 SHEETS-SHEET I.

A TTORNEY8 F. STARIN/ GRINDING MACHINE.

APPLICATION HLED NOV. 1. I916.

1 ,229, 1 62. Patented J 11116 5, 1917.

' 5 SHEETS-SHEET 2.

F. STARIN.

GRINDSNG MACHINE.

APPUCATION FILED NOV-1.1916.

Patented June 5, 1917.

5 SHEETS-SHEET 3- A 110mm F. STARIN.

GRINDING MACHINE. momma HLED uov.1. 191s.

Patented June 5, 1917.

5 SHEETS-SHEET 4.

INVEN TOR did)" A TTORNEVS WITNESSES F. STARIN.

GRINDING MACHINE- APPLICATION mu) NOV. I 1916.

Patented June 5, 1917 5 SHEETS-SHEET 5.

W aZ/TNE W W A TTORNEYS FRANK STARIN, OF SPRINGFIELD, MASSACHUSETTS.

GRINDING-MACHINE.

Specification of Letters la'tent.

Application filed November 1, 1915; Serial No. 128,852.

To all whom it may concern:

Be it known that I, FRANK 'IARlN, a subject of the Emperor of Austria, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have il'ivented new and, Improved Grind mi;- Machine, of which the following is a in 1, clear, and exact description.

The invention relates to machines for grinding and polishing raw castings of the 1 rings of ball hearings such, for instance, as shown and described in the application for Letters .lIfatent of the United States, No.

72,260 and No. 93,886, filed by me on January s 1.5, 1.916, and April 27, 1916, respectively.

The object of theinvention is to provide a new and'improvcd QI'l'lldlllg machine acranged to simultaneously grind three of the founfaces of a ball bearing ring 'wlthout cha ging the latter in its holding chuck.

In order to accomplish the desired result,

use is made of a revolulolo chuck. adapted to engage and hold the ring at one side theretiif, a plurality of revoluble spindles at angles one to the-other and carrying grind,- ers or grinding wheels, and actuating means for bodily nnwing the said spindles to engage one of the grinding wheels with the outer peripheral face of the ring, to engage anothergrinding wheel with the inner face of the "ring, and to engage a third grinding wheel with the other side'oi't' the ring.

' A prai'ztical ei'nbodiinent of the invention is rcrn'cscntcd in the accompanying drawings forn'ling a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Fignre l is a plan view of the grinding machine Fig. 2 is a sectional side elevation of the same on the line 2 ---2 of Fig. 1;

Fig. 3 is a cross section of the same on the line 3--3 of Fig. 5;

Fig. 4 is a similar view of the same on the line 4----l of Fig. 5;

Fig. 5 is a sectional plan view of the' grinding l'nuchine on the line of Fig. 2;

Fig. (i a sectional side elevation. of the feed mechanism for the carriage carrying the grinding: wheel used for finishing the outer peripheral. face of the ball bearing ringnhjihe section being on the line 6-6 of Figrfljf;

7 a perspective viewof the fixed 8 a cross section of the feed mecha- PatenhcdJune 5, 1917. v

ball hearing ring. the section being on the line 8---8 of Fig. i;

Fig. 9 is a. side elevation of part of the mechanism for imparting movement to the carriage carrying the peripheral face grinding Wheel; i

Fig. 10 is a similar view of part of the meclmnism lo].- imparting movement to the carriage tor the side grinding wheel; I

11. is a similar view of the mechanism for imparting movement to the carriage for the outer side grinding wheel, part being shown in section;

Figs. 12 and 13 are face views of tlfie enacting disks of the carriage feeding mechanism; and

Fig. 14 is a'stud for adjustably connecting the coactingdisli's with each other.

The raw casting of a ball bearing ring 20 held at onevside in revolublc chuck 21 and the inner face of the ring 20 including the hall race is ground or finished by a tool, preferably in the form of a revolublc grinding wheel 22 secured on one end of a spindle 23 journaled in a head stock 24 and provided with a pulley 25 connected by a belt and pulley with an overhead countershaft for continually rotating the spindle 23 and its grinding Wheel 22. The outer side of the ring 20 is finished by a tool .in the form of a grinding Wheel 26 attached to a spindle 27 journaled in. a head stock 28 and provided with a pulley 29 connected by belt and pulley with. an overhead coun- I I tel-shaft for continually rotating the spindle at an angle to the of the chuck 21 and to the spindles 23 and 31, and one edge rnf 108 (as shown in Fig. l.) while the spindle 27 is the grinding wheel 26 serves to out the outer side of the ring to finish said outerside.

The chuck 21 is mounted on a spindle 34 journaled in a head stock 35 and provided with a pulley 36 connected by belt and pullay with a 'countershaft for continually rotating the spindle 34 and the chuck 21 holdversely adjustableion the guideways 40 by.

the useof a'screw rod 42 screwing in a nut 43" forming part of the carriage 37. The

outer end of the screw rod 42 is provided with a worm wheel 44 (see Fig. 3) in mesh with a worm 45 formed or secured on a longitudinally extending shaft. 46 journaled in suitable bearings arranged on the bed plate 41. The left-hand end of the shaft 46 18 provided with a suitable handle-47 under .the control of the operator for turning the shaft 46 with a view to rotate the screw rod 42 and thereby shift the carriage 37 and it's head stock 35 in a transverse direction. It is understood that on turning the screwrrod 38, the head stock 3 5 is shifted in a longitudinal direction so as to move the chuck 21 and the ring 20 held thereby in proper position relative to the grinding wheels 22, 26 and 30.

The head stock 24 carrying the spindle 23, provided with the binding wheel 22, is mounted to slide transversely on guideways 50 formed on the top of a slide 51 mounted to slide longitudinally in guidewa-ys 52 formed on the top of a support 53 secured at its forward end on a vertically disposed pivot 54'journaled in a suitable bearing 55 arranged on a ,shaft 56 mounted to slide 101 tudinQl-y'in guideways 57 forming 'art Hi P of t e body plate all i The head stock 24 is provided with a nut 60 in which screws a feed screw 61 provided at its forward end with a handle -62 under the control of the operator to permit of shifting the head 24 in a transverse direction to correctly set the grinding wheel 22 relative to the inner surface of the ring 20. The slide 51 is provided with a set screw 63 adapted to abut against the right-hand'end of the support 53 to limit the movement from the right tothe left of the slide 51, The top of the slide 51' is provided with a pin 64 projecting through a slot 65 formed in a transverse .lcvcr 66 fulcrumed at its rear end at 67 on the top of the support 53. By the operator nianipulating the handle 66 the slide 51 can be lifted from the left to the right or back to the adjusted position, that is, until the set -tion is given to the main drivin screw 63abuts against the right-hand end of the su port 53. 4

By re erence to Fig. 2, .it will be noticedthatthe support 53 rests with its lcfthand end on the carriage 56 and is thus free-to swing in a lateral direction so that the grinding wheel 22 can follow the shape of the ball race'on the inner face of theriug 20 to correctly grind the said'ball race and using the entire half round peripheral face of the grinding Wheel 22, thus insuring uniform abrading of the eripheral face of the grinding wheel 22. 6n the lower reduced end 68 of the ivot 54: is secured a pinion 70 in mesh with a rack 7'l mounted to slide longitudinall in" bearings .72 arranged on the frame 0 the bed plate 41 (see Fig. 5). The rack 71 is pivotally connected by a pitman 7 3 with a stud 7 4 having its head slid-able in a diametrical groove 75 formed in the under side of a disk 76 (see Fig. 11) secured on the lower end of a shaft 77 journaled in asuitable bearing 78 forming part of the framework of the bed plate 41.

The stud 7% disk 79 provide with a diametrical tongue 80 slidably engaging the groove 75 in the disk 76. On loosening the stud 74 the disk 76 and with it the stud 74 can be adjusted more or loss out of center relative to the center of the disk 76 to increase or decrease the stroke given by the stud 74 and the pitman 73 to the rack 71: ()n the upper end of the shaft 77 is secured a pinion 81 in mesh with a gear wheel 82 mounted to rotate on a vertical. shaft 83 journaledin a suitable' bearing of a support 84 forming part of the framework of the machine.

fpasses centrally through i On the top of;

the gear wheel 82 is secured a bevel gear 7 wheel 85 in mesh with a pinion 86 secured on i one endi'of a main driving shaft 87 journaled on the framework and carrying a manually controlled clutch 88 adapted to 'be.en, ,o'agedv with a clutch member 89' arranged on the cone pulley 90 connected by belt with other machinery. When the clutch 88 is in engagement with the clutch member- 89 and the cone pulley 90 is rotated then a rotary moshaft 87 which by the pinion 86 and the evel gear wheel 85 rotates the gear wheel 82. The rotary motion of the latter is transmitted by the pinion 81 to the shaft 77 to rotate the disks 76 and 79 witha view to impart 'a reciprocating motion to the rack 71, as pre; viously mentioned.

The gear wheel 82 is in mesh at its righthand side with a pinion 91 secured on the upper end of a vertically disposed shaft 92 journaled on the bearing support 84. The lower end of the shaft 92 is provided with a disk 93 having a diametrical groove 94 engaged by a tonguc'flfz formed on a roller 96 attached ecceutrically to the disk 93 by a stud 97 engaging the groove 94. The pc-' minimum it a I the rii'ig 120 under treatment at the time. The I 1 sad etneh is held adjustable 011 the guide- 13's 110 by the 1 :Qi wfl. feed screw 125 mg in :i :nut l tiiformed on the head we at" the reihjir 91) by a, tee Fig; and the said feed screw -spring 100 attached (1,13 One end. t the lewer jrmrneied in the slide 111 and is end 68 of the pivot 54: and fastened :it the prdvided at its outer end with it handle 127. other end to the bearing sn .iport under the nut 1 0f theeperator for turn- Fig. 2). When the gemwheei ed, i. screw 1% with view to 'XIlOVb' as previously explu i then 1, r01. .1 dirt 'on of the axis tion is transmitti e inieii $5 1 te the .1 cutting edge shaft 952 whereby Ml :mhited d proper relation a rotary metirm t0 the roller 911 bit 0 the ring .201 held eeeeentrieail This is nmnnted to slide 1U .i'oi'i'lied on the t0 slide transriphel'al face of there? the peripheral face 0.. it. r01

ta rotate loesel on the huh. (ifth 70, and this re ler 9 is heid in. ange nent 5 with'the peripheral fzt is engaged. h

minted forwuriil. and heelnmr cl n'mvenient pivot 54 so that :11. ihrWn/rd and siidin mover. til '0 the arid t 1e supp rt 'whieiri littt 30 in addition. irei swing .e 'itmlinally in i. 011 the bed plate 41 nder e of the cm'ri a Siltlfl 135 on w ieh is rriiier .136 in. frietimlal. It. face of 51101181 11y by a stud 138 to nit-n 1.40 mountt 111 jouriiziled dill frame 01 the grinding machine. i U in. mesh with the gear 5!) that when the nmehiiie is rum FOCrttiil'lg metion. gi iven t0 the by the action 011': tie eccentric relier 186, A nring 1.39 I shed at on: end tn the bed plate 41 er 116 is previed and ,hi-iother end to the carringti 133 to t 35 with a dovetail tmlgue, 120 m gaging the lmid the roller 1% :it' all times in cdntact correspondin 1y shaped grmve 11?) sh t0 with the reller 13". The Stud 138 is adjustpermit of a Justing the roll 16 diameiw ah mmin'tedinupireteigreove143f0r1i1ed rica1ly.'0n the pinion. the d roller 116 in it top 0f the extension 1.39 efthe pinion being eccentrically UH ted r1 tire tn the 1 18 end the trade 'ie of the roller 137 is 40 pinion 81 by the use [if the st 1, 1 Zihini pmvided withgi, 'tmig'i'le 14A. enga "11g said .any desired throw mm. be given. tn "the ear groove .1 7 the Inmhine is running riage 112 by changhiig the pneit n the 4 1fi(3i.1i)]."()t3rlit11]g1 tien gm ntn the car-- stud 118 and that of the :mlier 1 ted, riiige 133 in a. ham nvite di .ection to move on the pinion 81. .A. expiring watched the g i bodily in the same di- 45 at ene end to the bed p1,. 1nd at its rei. in with a, View tie grind the peripheral other end to the her t0 he 1. he fume 011' the ring; 20. roller 11.5 thereef at :1 i vith. .ln erder 151. :ii the reller 116. It arrangement if 1 a nn 0 L the turning niereiinent given te the piwit The head stock: Ii? n'nmnted, te slide uidewaye .110 in i1: en the t1 mi :1 elide 11' mounted to 'ie tiiiiiil i 25 ria'ge 112 (see .b 3} men transversely on guidewitye 11.3 r the bed plate 41. ".Phe ur carrihge 112 is provided with a str 1 1. 1. en --which is mounted te turn a roller 116 ad- 30 justably fastened to the top exteneien 117 of the pinion 81 by the use of it etuiil 118 engaging a dianietrieril git-new 119 iierniied in the top extension. .11 hit the pinion The under side of the r .it the head stock 0n the screwing in it nut 151.

-50 the parts su'ppei *(in. tire ll'l lCNEMll red on the under side of, bodily 111 a transverse direction. at) that one The screw rod is corner of the gri. hrn inthe slide 131 and is preacross the outer (if the ring 210 tn iiinieh 'vided at its c .ter end. with a. handle 152 unthe said outer side. der the control. 0f the operator for turning 55 .The slide 11]. is :tdjlistelfly mminted on the shrew red. 1550 witlii view'to shift the 2 the carriage 1152 and for this pnrpeee use is head :itriei: if? in longitndiimi direction made (if a W rd. 19"? mounted te indii Wheel 30 into proper the-carriage 1111i, ti tn the formed on the rm arm "r i B0 The rear rig Wheel. 9-6 it; moved men tn t 1 i iide 11:11.

1.1 farmed rm the 1dr; 13.1 The acre-w rod i n urn. 0n the carriage 133' its n" end with. a (auntie (if the eperw 130.

a trensveree dire! (m. in "hirer NI. 1 we the E5 the grinding Wh iii 26 rel:

tor for manually shifting the slide 131' in a 'spring riage has reached the made,

transverse direction on the carriage 133 whenever it is desired to do so to properly move the grinding wheel 30 in proper starting position in a transverse direction relative to the ring 20.

1n order to feed the several grinding wheels 22, 26 and 30 for making diii'erent cuts on'the corresponding faces of the ring 20 until the said faces are ground to the proper size, use is made oi? automatic feeding devices practically alike in constructions so that it suliiees to describe but one in detail, it being, howcvpr, understood that the feeding devices are mounted on the feed screws 61, [25 and 160, respectively, special reference being had to Figs. 1, 6 and 8. On the corresponding teed screw 61, 125 or 160 is secured a ratchet wheel 170 engaged by a spring-pressed pawl 171 fulcrunied on a lever 172 mounted to swing loosely on the COI'IOSPOHdlIlg feed screw 61, v125 or 160.

One end of the lever 172 is pressed-on by a 17 3' and the other end of the said lever is provided with a cam 174 adapted to en age a cam175 secured on. the top of thebe plate 41. When the corresponding carcndof its stroke the cam 17 t of the lcver172 clutchesthe cam 175 whereby a carrying motion is given to the lever 172 to cause the pawl 171 to turn the ratchet wheel 170 so that the corresponding feed screw 61, 125 or 160 ie-turned to set the grinding wheel for making another out on the corresponding face of the ring 20.

' The oscillating movement of thelever 1.72 is limited by stops 176 and 177 attached to the corresponding carriage of the grinding wheel 22, 26 or 30.

In order to stop each feed mechanism after the desired number of cuts have been use is made of an arm 178'secured on the corresponding feed screw 61, 125 or 160 and adapted-toengage a-pin 179 on the pawl 171 to throw the latter out of engagement with the ratchet wheel 170, thus stopping further turning of the corresponding feed screw.

The operation is as follows: I

The grinding wheels 22, 26 and 30 are T shown at the beginning of the operation and when the machine is running the several carriages 56, 112 and 133 are moved simultaneously,that is, the carriages 56 and 133 are caused to move from the right to the left while the carria 112 is moved transversely toward the rent so that the grinding wheel 22 grinds the inner face of the ring 20,-the grinding wheel 30 grinds the peripheral face of the ring 20, and the grinding wheel 26 grinds the outer side of the' said ring 20. When the carriage 56 nears the end of its stroke to the left then a swinging motion is given to the support 63 by turning the pivot 54 as previously exwith it the cutter 22 to $16 respectively (see Fig. 2

plained to cause the grinding wheel 22 to finish the ball race on the inner face of the ring 20. vVhen the carriages 56, 112 and 183 near the end of their return strokes then the levers 172 engage the corresponding cams 175 thus imparting a swinging motion to the lovers which by the pawl 171 turn the ratchet wheels 170 thereby turning the several feed screws 61, 125 and 160. The grinding wheels 22, 26 and 30 at their nextiorward movement take off another chip, and this operation is repeated until the three faces of the ring 20 are properly finished, at which time the arms 17 8 engage the pins 179 and'throw the pawls 171 out of engagement with the ratchet wheels 170 thus stopping further feeding of the feed accomplished by the action of the corresponding springs 1.00, 121 and 142. I

It is a so understood that the studs 74 and 97' are set relative to each other so that at the beginning of the movement of the carriage 56 the stud 74 has. a slower longitudinal travel than the stud 97 and hence the pivot 54 is not turned, but when the carriage 56 nears the end. of its stroke the stud 74 travels'faster in a longitudinal direction than the stud. 97 and hence the pivot 54 is turned to swing the sup ort 53 sidewise and old the latter at all times inradial position in the ball race of the ring 20. In case the ball race of an outer or inner ring only is to be finished either interiorly or exteriorly then the stud 97 is moved into a central position on the disk '93 to stop the reciprocation of the carriage 56 but to allow the support 53 to swing sidewise. The carriage 56 when not actu ated is preferably locked in place by inserting a pin in the holes 190 and 191 formed in the bed plate 41 and the carriage After the ring 20 has three of its facesas described then the ring is removed from the chuck 21 and its fourth face is finished in a separatemachingand, if desired, it can be finished this machine by engaging the previously finished I been finished on.

side with the chuck 21 and then finishing off the outer side by the use of the inding wheel 26. During this operation t e other grinding wheels 22 and 30 are not used..."

'Although' in the foregoingI have shownand described the grinding machine as used 'for grinding three faces of a ball bearing ring, it is evident'that I do not limit myself to the use of the machine for this purgrinder with 'theinnfer face of*the r1ng,. and

1d a onehtogthe other and carry1ng gr1nders',.and

pose only, as other rings, such, for instance, as roller bearing rings,'-I'nay lie-finished by this machine in the same manner.

"Having thus describedjmy' invention, I claim as new and desire to'secure byLetters Patent-:ei I 1. In a grinding machine for finishing a bearing, ring, a revolu'ble chuck adapted to engage and hold the ring at one side thereof, a pluralitygof reyoluble spindles at angles actuating means-for bodily and simultaneously nioving the said spindles to engage one o fqthe grinders with the'outcr peri e'ralface of theiring, to engage another to engage a third grinder with the oth cigj side of the ring. +5

21111 a grinding chine for "n ding bearing rings, at revoluble' holder or hold-' ing the ri'n' at one side, a plurality of revo-' luble spin les carryingz'grinders', carriages on "which the said spindles are mounted,

L actuating means; for simultaneously :im-'

ph rting movement to the -saidcarriages to engage. one of thegrinders with the outer peripheral face of the ring, to engage 'another grinder with. the inner face' of the ring and to engage the third grinder with the other side 30f the ring; and automatic.

- feeding "means for feeding the said carbearing rings, a revoluhle holder for revoluble spindles carrying grinders; car-' na cs step by step forgthe grinders; to

ima e successive cuts on the corresponding facesiof the rintg. h f I i ing the Ting-at one side, a plurality of riages on which the said spindles are mounted, actuating means for sumultaneously imparting movement to the said carriages to; enga e one of" the grinders with the outer perip eral teacher the ring, to ena another 'nder'withthe inner bearm third ace of the ring and =to en age the grinder with the other side c the ring, automatic feedingmeans for feeding the said jcarriages step by step for the grinders to automatically throw the feed mechanism out of aciion. d h da 4. n a grin ing mac inc or! 'n mge-i bearin ring, a revoluble 'chuck'gdhpted -to make successive cuts on the-correspondmg faces of the. ring, and stopping means to hold t c ring, a revoluble spindle carrying tgrinder adapted t grind the inner-fate of the ring 'a head stockin which the said spindle is Journaled, the head stock being mounted to swing on an axis, intersecting the axis of the said chuck at a right angle and intersecting the ball race of the bearing rinp; at the beginning of the curved portion at the ball race, and means for imparting a traveling motion to the said head stock toward and from the said chuck and imparta of the ring,

fling alateral swingingmotion to the said "head stock for the grinder to grlujd the ball race on theinncr face of the ring.

5. In a grindlng machine for grinding a bearing ring, arevolubl'e chuck adapted to 7' hold the ring, a revoluble spindle carrying a grinder adapted to grind the inner face of the ring, a head stock in which the said I spindle is journaled, a carriage mounted to travel toward and fromthesaid' chuck, a 5 support pivoted on the said carriage and supporting the said head stock, the axis of, the pivot of thjesaid support intersecting the axisaof the said chuck at a right angle anjd intersecting the" ball race. of the bear-- gc in g zring at the beginning of the curved peigtion of'the ball race, and means for im-- pa}r ting,a traveling motion to the said'ar riag'eand aswinging motion to'th'e said support. p 6.. In agrinding machine. for grinding a hearingring, a revohible chuck adapted to hold the ringya revoluble spindle carrying agrinder adaplted to grind the; inner face a cad stock inrwhich the said spindleis ournaled, a carriage mounted to travel toward and from the said.,chuck, a

support pivoted-on the said carriage and ,snp'portingthe said head stock, the pivot of 'thefsupportbeing 1ournaled inithe carriage 9,5

and extending beyond these-me, the axis of" the" said piirotintersect'ing the axis of the said chuck, and means c'onnectedwith'the projecting'end of the pivot :for niovin'gi'the latter forward andvbackwa-rd and turning 100 the same.

' 7 Ina" grinding machine for grinding jbearinggring; a revoluble chuck adapted to hold the ring, a revoluble spindle carrying.

a grinder adapted to grind the inner face of i the ring, a head stock in ,which the said. spindle is journaled, a carriage mounted to travel toward and =frdm the said chuck, a supportpivotedwon' the said"c a and supporting the said head stock, e "pivot of al o the support being journaled in the carriage and extending beyond the same, a pinion se- H cured on the extended and of the said pivot, a reciprocating rack in mesh withf' the said pinion, a roller journaled on the h bwof the p nion, a rotating eccentric rolle in pa"- 'ripheral engagement withthe said pinion ro ler, anda spring iorholding the said in;- zion roller in contact ,with the eccentric ro ler.

" 8. In a grinding machinefor grinding a;

bearing ring, a revolubl'e chuck adapted to hold the ring, a revoluble spindle carrying a grinder adapted to grind the inner face .of

the ring, a head stock in which the said N spindleis journ'aledyu carriage mounted to travel toward and from the said chuck, a

support pivoted on the said carria and;

supporting the said head stock; thepivot of. the support being journaled in the carriage P and extending beyond the same, a pinion se- 15:0 

